Add installation of work done so far.

The install is equivalent to the autoconf install with no options.

Note that where the autoconf adds copies of manual pages renamed to individual APIs via a script manpgaltnames (in doc), this functionality is now done in pure CMake, to ensure it works on Windows.

Also note there is no 'make uninstall'. See https://gitlab.kitware.com/cmake/community/wikis/FAQ#can-i-do-make-uninstall-with-cmake.

CMakeLists.txt

@@ -549,7 +549,76 @@ target_link_libraries(getdns_server_mon
   )
 set_property(TARGET getdns_server_mon PROPERTY C_STANDARD 11)
 
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/include/cmakeconfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/getdns/getdns.h.in ${CMAKE_CURRENT_BINARY_DIR}/getdns/getdns.h)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/getdns/getdns_extra.h.in ${CMAKE_CURRENT_BINARY_DIR}/getdns/getdns_extra.h)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/version.c.in ${CMAKE_CURRENT_BINARY_DIR}/version.c)
+# Substitutions in files.
+configure_file(cmake/include/cmakeconfig.h.in config.h)
+configure_file(src/getdns/getdns.h.in getdns/getdns.h)
+configure_file(src/getdns/getdns_extra.h.in getdns/getdns_extra.h)
+configure_file(src/version.c.in version.c)
+
+set(version ${PACKAGE_VERSION})
+set(date ${API_VERSION})
+file(GLOB mans doc/*.3.in)
+file(MAKE_DIRECTORY man3)
+foreach (man ${mans})
+  get_filename_component(out ${man} NAME_WE)
+  configure_file(${man} man3/${out}.3 @ONLY)
+
+  # Look through the page and make copies of the page for all APIs
+  # defined in that page. Defined means listed in a line ".B <name>"
+  # between lines ".SH NAME" and ".SH LIBRARY". Ignore terminating ","
+  # or spaces in .B line.
+  file(STRINGS ${man} manpage REGEX "^.(SH|B) ")
+  set(in_list 0)
+  foreach (line ${manpage})
+    if ("${line}" STREQUAL ".SH NAME")
+      set(in_list 1)
+    elseif ("${line}" STREQUAL ".SH LIBRARY")
+      set(in_list 0)
+    elseif (${in_list})
+      string(REGEX REPLACE ".B *([^ ,]+).*" "\\1" alt "${line}")
+      configure_file(${man} man3/${alt}.3 @ONLY)
+    endif ()
+  endforeach()
+endforeach()
+
+set(prefix ${CMAKE_INSTALL_PREFIX})
+configure_file(getdns.pc.in getdns.pc @ONLY)
+
+# Installing.
+install(TARGETS getdns getdns_shared getdns_query getdns_server_mon
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib
+  )
+
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/getdns DESTINATION include)
+install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/man3 DESTINATION share/man)
+
+set(docdir share/doc/getdns)
+install(FILES AUTHORS ChangeLog COPYING INSTALL LICENSE NEWS README.md DESTINATION ${docdir})
+install(FILES spec/index.html DESTINATION ${docdir}/spec)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/getdns.pc DESTINATION lib/pkgconfig)
+
+install(CODE "message(\"\
+***\n\
+***  !!! IMPORTANT !!!!\n\
+***\n\
+***  From release 1.2.0, getdns comes with built-in DNSSEC\n\
+***  trust anchor management.  External trust anchor management,\n\
+***  for example with unbound-anchor, is no longer necessary\n\
+***  and no longer recommended.\n\
+***\n\
+***  Previously installed trust anchors, in the default location -\n\
+***\n\
+***        /etc/unbound/getdns-root.key\n\
+***\n\
+***  - will be preferred and used for DNSSEC validation, however\n\
+***  getdns will fallback to trust-anchors obtained via built-in\n\
+***  trust anchor management when the anchors from the default\n\
+***  location fail to validate the root DNSKEY rrset.\n\
+***\n\
+***  To prevent expired DNSSEC trust anchors to be used for\n\
+***  validation, we strongly recommend removing the trust anchors\n\
+***  on the default location when there is no active external\n\
+***  trust anchor management keeping it up-to-date.\n\
+***\")")